a = {
    "a":1,
    "b":2
}

print(a)
a.pop("a")
print(a)

arr = [9,8,7,6,5,4,3,21]

def fastSort(arr:list):
    if len(arr) <= 1:
        return arr
    n = arr[len(arr) // 2]
    left = [x for x in arr if x < n]
    mid = [x for x in arr if x == n]
    right = [x for x in arr if x > n]

    return fastSort(left) + mid + fastSort(right)

print(fastSort(arr))